| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Philips | GR2.2 | Too little color saturation in CVBS mode | In teletext mode, color saturation is OK. Check supply voltage for IC7307. When < 5 volt, replace D6310 (LLZ-C5V1; 4822 130 80884) | ||
| Philips | GR2.2 | The width changes up to 2 cm when adjusting contrast | Capacitor 2526 (4822 122 32857) leaks on picture tube panel. | ||
| Philips | GR2.2 | Teletext panel | Teletext panel Early versions of the GR2.2 chassis use the teletext decoder of the GR2.1 AB (4 IC version). From week 9228 the 3 IC version (shown in the GR2.2 AA manual page 6.54) is used. However, the circuit and PCB layout are changed. For details o | ||
| Philips | GR2.2 | Sound mute on cable networks and with some VCRs. | Cut the copper track from pin 18 of position number 7200 (TDA8415) to the "via hole" and solder 8K2 (4822 051 10822) between pin 15 and pin 18 of position number 7200 and solder 4K7 (4822 051 10472). | ||
| Philips | GR2.2 | Sound mute on cable networks and with some VCRs. | Remove 9202 and place 4K7 (4822 051 10472) between pin 18 and ground of position number 7200 (TDA8417) and place 8K2 (4822 051 10822) between pin 15 and 18 of position number 7200. | ||
| Philips | GR2.2 | Sound mute on cable networks and with some VCRs. | Remove R3064 on stereo IF module, replace R3065 by 4K7 (4822 051 10472). Add on R3070 8K2 (4822 051 10822). | ||
| Philips | GR2.2 | Sound mute and searching does not stop | Replace Micro IC7708 (4822 209 31212) and IC7470 TDA2579B (4822 209 63423) on the chassis. | ||
| Philips | GR2.2 | Sops moire in the picture | Replace pos.nr. R3450 by 27kOhm (4822 053 11273) on the chassis REMARKS: introduced in production from week 9438 onwards | ||
| Philips | GR2.2 | Sometimes no TXT. Sometimes wrong characters. | Clock 27Mhz O.K. Replace IC7800 (SAA5246AP/ E/S 4822 209 32642). Replace X1800 (4822 242 81191) | ||
| Philips | GR2.2 | Skips VCR channel when tuning | Some cases may occur where a GR2.2 receiver will not capture a VCR test signal during tuning. This is because some VCR test signals do not include complete field and line sync pulses which the receiver requires for ident purposes. The simple answer is t | ||
| Philips | GR2.2 | Set responds very slow to commands from either RC or local keypad. | Fault suspected to be databus problem. Upon removing the teletext PCB normal operation resumed. Fault was found to be caused by low +5V on text board, caused by T7872 (4822 130 41344) being open circuit. | ||
| Philips | GR2.2 | Set dead and SOPS tripping | This fault was caused by D6646 (4822 130 42488) and C2646 (4822 124 80054) both being short circuit. | ||
| Philips | GR2.2 | Service Mode access | Short pins M43 and M44 on chassis to get into service menu | ||
| Philips | GR2.2 | Service manual corrections | Service manual corrections The parts lists of GR2 service manuals should be corrected as follows: Service manual for 21ST2731/05B 4822 727 19403 Add control panel code no. 4822 432 10957 Service manual for 25ST1750/25B 4822 727 19042 Item | ||
| Philips | GR2.2 | Screeching noise then dead - LOPTr goes s/c | TDA2579B timebase IC |